ReadHBSparse

Calling Sequence

Arguments

(optional) a string given the filename (eventually preceeding
by the path), if filename is not given then the function use uigetfile to get filename
interactively

A

the sparse matrix

description

a string given some information about the matrix

ref

a string given the reference of the matrix

mtype

a string given the type of the matrix

Description

An utility to read the Harwell-Boeing sparse matrix format.
Currently do not work for unassembled matrix. Also the eventual rhs vectors
of the file are not returned. Generally the file name is of the form
ref.mtype where mtype is a 3 letters word abc given some information
(already inside the file) on the matrix :

References

Users' Guide for the Harwell-Boeing Sparse Matrix Collection Iain S.
Duff, Roger G. Grimes, John G. Lewis. You may found this guide and
numerous sparse matrices (in the Harwell-Boeing format) at the University
of Florida Sparse Matrix Collection